1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Copyright IBM Corp. 2022 4 * Author(s): Steffen Eiden <seiden@linux.ibm.com> 5 */ 6 #ifndef __S390_ASM_UVDEVICE_H 7 #define __S390_ASM_UVDEVICE_H 8 9 #include <linux/types.h> 10 11 struct uvio_ioctl_cb { 12 __u32 flags; 13 __u16 uv_rc; /* UV header rc value */ 14 __u16 uv_rrc; /* UV header rrc value */ 15 __u64 argument_addr; /* Userspace address of uvio argument */ 16 __u32 argument_len; 17 __u8 reserved14[0x40 - 0x14]; /* must be zero */ 18 }; 19 20 #define UVIO_ATT_USER_DATA_LEN 0x100 21 #define UVIO_ATT_UID_LEN 0x10 22 struct uvio_attest { 23 __u64 arcb_addr; /* 0x0000 */ 24 __u64 meas_addr; /* 0x0008 */ 25 __u64 add_data_addr; /* 0x0010 */ 26 __u8 user_data[UVIO_ATT_USER_DATA_LEN]; /* 0x0018 */ 27 __u8 config_uid[UVIO_ATT_UID_LEN]; /* 0x0118 */ 28 __u32 arcb_len; /* 0x0128 */ 29 __u32 meas_len; /* 0x012c */ 30 __u32 add_data_len; /* 0x0130 */ 31 __u16 user_data_len; /* 0x0134 */ 32 __u16 reserved136; /* 0x0136 */ 33 }; 34 35 /* 36 * The following max values define an upper length for the IOCTL in/out buffers. 37 * However, they do not represent the maximum the Ultravisor allows which is 38 * often way smaller. By allowing larger buffer sizes we hopefully do not need 39 * to update the code with every machine update. It is therefore possible for 40 * userspace to request more memory than actually used by kernel/UV. 41 */ 42 #define UVIO_ATT_ARCB_MAX_LEN 0x100000 43 #define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000 44 #define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000 45 46 #define UVIO_DEVICE_NAME "uv" 47 #define UVIO_TYPE_UVC 'u' 48 49 #define UVIO_IOCTL_ATT _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb) 50 51 #endif /* __S390_ASM_UVDEVICE_H */ 52